A hybrid ferromagnet-superconductor spin valve is proposed. Its operation relies on the interplay between nonequilibrium transport and proximity-induced exchange coupling in superconductors. Huge tunnel magnetoresistance values as large as some 10^6% can be achieved in suitable ferromagnet-superconductor combinations under proper voltage biasing. The controllable spin-filter nature of the structure combined with its intrinsic simplicity make this setup attractive for low-temperature spintronic applications where reduced power dissipation is an additional requirement.
@article{arxiv.cond-mat/0603555,
title = {Huge nonequilibrium magnetoresistance in hybrid superconducting spin valves},
author = {F. Giazotto and F. Taddei and Rosario Fazio and F. Beltram},
journal= {arXiv preprint arXiv:cond-mat/0603555},
year = {2007}
}